English Pea and Sweet Onion Risotto

Name: English Pea and Sweet Onion Risotto
Ingredients: 5 cups chicken stock; 5 tablespoons extra-virgin olive oil, plus more for drizzling; 3/4 cup small diced Spanish onion; 1 clove garlic, minced; Kosher salt and freshly ground black pepper; 1 cup carnaroli rice; 1 cup white wine; 5 tablespoons unsalted butter; 1 cup frozen English peas,defrosted; 1 tablespoon minced fresh chives; 1 tablespoons fresh tarragon leaves; 1/2 cup freshly grated Parmesan; 1 teaspoon lemon zestplus 1 teaspoon lemon juice; 1 teaspoon white balsamic vinegar